Multi-Colour Print Calculator — Filament & Waste
Calculate total filament needed for multi-colour prints including purge tower waste, and compare cost against single-colour printing.
Number of different yarn colours used
Average model weight per colour
Purge tower volume per colour change
Total changes across all layers
How We Calculate This
This calculator totals the filament for all colours plus purge tower waste from colour changes.
The formula
Model filament = Colours x Weight per colour
Purge waste = Colour changes x Purge volume x Density
Total = Model filament + Purge waste
Frequently Asked Questions
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Work out the material cost of a print based on filament weight and spool price.
Spool Life Calculator
Estimate how many prints you can get from one spool of filament.
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Calculate cross-sectional area and volume per metre for any filament diameter.
Last updated: March 2026
All calculations are estimates. Always verify settings with test prints before committing to final prints.